(ANXIETY) [noun] [U] - sudden anxiety and fear, esp. that something dangerous or unpleasant might happenI told her only half the story because I didn't want to cause her/give her any cause for alarm.The villagers have reacted with alarm to news of a proposed new airport.
ALARM
Meaning of ALARM in English
Cambridge English vocab. Кембриджский английский словарь. 2012